MQTT API

Use the MQTT API to update ThingSpeak™ channels

The ThingSpeak IoT platform enables clients to update and receive updates from channel feeds via the ThingSpeak MQTT broker. MQTT is a publish/subscribe communication protocol that uses TCP/IP sockets or WebSockets. MQTT over WebSockets can be secured with SSL. A client device connects to the MQTT broker and can publish to a channel or subscribe to updates from that channel.

To get started with the MQTT API, see: MQTT Basics. For client configuration information for your specific library, see MQTT library configuration.

Publish

`Publish to a Channel Feed`	Publish message to update multiple channel fields simultaneously with MQTT
`Publish to a Channel Field Feed`	Publish message to update single channel field with MQTT

`Subscribe to a Channel Feed`	Subscribe to updates from channel feed with MQTT
`Subscribe to a Channel Field Feed`	Subscribe to channel updates from specific field of channel with MQTT

Topics

MQTT Basics
Learn about the publish/subscribe architecture for connecting bandwidth and power-constrained devices over wireless networks.
Choose Between REST API and MQTT API
Learn when to use REST and MQTT to update a channel.
Publish and Subscribe to a Channel Using Desktop MQTT Client
This example shows how to use a desktop MQTT client to publish and subcribe to a channel.
Publish Using WebSockets in Python on a Raspberry Pi
This example shows how to use WebSockets on port 80 to publish to a ThingSpeak channel using a Raspberry Pi board that runs Python.
Use Particle Photon Client to Subscribe to Channel Updates
This example shows how to use a Particle Photon board to subscribe to channel updates from the CheerLights channel.

Troubleshooting

Troubleshoot MQTT Publish

Get help to resolve common mistakes when using MQTT publish.

Troubleshoot MQTT Subscribe

Common mistakes and problem resolution for subscribing to ThingSpeak.

Related Information

How to Download Root Certificate Authority (CA) for MQTT Functions

Featured Examples

Publish and Subscribe to a ThingSpeak Channel Using Secure MQTT

Use an ESP8266 board to record RSSI data in ThingSpeak™ via secure MQTT. You can modify the code as indicated in its comments to adapt it for other boards or nonsecure MQTT.

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Publish to a ThingSpeak Channel Using a Particle Device Client via MQTT

Publish measured values to a ThingSpeak channel via MQTT using a Particle device such as a Boron, Argon, Photon, or Electron. If you have more than one value to send to ThingSpeak, you can publish multiple values to a channel feed. Alternatively, if you have only one sensor, you can publish a single value to a channel field.

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Remote Sensor Control Using Secure MQTT Publish and Subscribe

Use the MQTT publish and subscribe architecture in ThingSpeak. The MQTT protocol is a low-overhead device messaging system. Using MQTT, subscribe to field 1 of a control channel. When you update the control channel, the posted value is sent to your device. The servo rotates to the specified angle. The device measures the network strength and updates the storage channel. Comments in the code indicate how to adapt this example for a nonsecure connection.

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